Boomerang.



nmntoz W. H. V. SHRHM.

BOOMERANG.

AFPLICATW'N FILED AUG. l. ISIS.

Pawnted Nov. 6, 1917.

50 the instrument isputtofsuchiueeniAdsb, this constructenfemployed asf-gareeslxowninvgthe BEST AVALABLE COF" Appucauoamd anni?, mei ohlnefliiizem To all 'whom it may concernw;` i* 1. Be it known that I, WILLIAM 1I-LN. SHRUjM, a citizen of the United States,f,residingat Columbus, in the countyl ofrEranklimand- State of Ohio, have invented certain newand useful Improvements inBoomerangejo which the following yis a sp'e'cication.k n.

This invention relates tor an linstrument commonly known as a boomerang,wherein considerable skill of the operatorie neces sary to make the instrument-properly sail through the air and return., 7

The main object of thisinvention in the peculiar shape of wings or venes constituting the boomerang, necessary to make 1t perform various functions {1nsailing through the air when properly thrown,-

Primarily, the invention consists,inrnakilljgv the vanes of a longitudinal unmflatoryy form representing a flattened S, more or less.' yBy 4 means of this shape, the air-iscleavedto a greater extent, thereby makingthe instrument soar to a higher levelgwhenf thrownlxin one manner or making itfsailJinV afrfshorjter circular path when throwninfanother mannen ln addition, the arrangement; may-be such as to cause a combininerofthegtwofae related.

A further object of this invention resides in operatively mounting a'sfspiural'itypvo boomerang vanes in connection with a lbfne unit, thereby causing this basevnnitgf Sear throuh the air when theinth en-F whole? is properly throewfn@y base unit, l do not meanion erang vanes itself, but wha'- in an extraneeus unit, 'whiVL assume various shape fowl, i i i f Still a further obj ect f sides in rotatably mountnig ture in connection with ehe: strument, whereby' a rotatie ,Y a s structure independent of 'theiretaryz llme ment` of the boom'erang'emayiiberiia when roperly thrwvn This -zispafrtioulef M gli Iin producing,f1variousweieets,fr@` erVM v stance, :by performers uponrgthe ibage' ende, likewise, the various precedingroljentsem also be utilized to marked advantage wlmi latter, fas wellias the varioushthenffataes, ay @be put Htocommerci'a 'useiwhentheeinf strumentis'used asratoy. i genna-fi *Various other features resid' n tHe merel iemef weisheit:

Figure flpis a `view..showingone e, slmllax: ,ehareetersa 0f` f reference vedesgnete eerrespondmg parte endk wherein =i ferm@ 6o which my invention ma. be put, y, l v

Figi@V isk an enlarg y cross sectionrtaken s, i throlgh alportion kof*thestructure'shown in F1g. Y; j p p Fig. f3 isan enlarged section taken on line -eof Fig. rend, f Figs.4,.5 and 6` are detail cross/sectional views taken nthrough onenofthe vanestasv represented on corresponding lines in Fig.;2. lnthesevdrawings, Lhaveishown a base unit 1 inthe shape of a fish, although it may be understeedf-,thetiths bese; vunitIrleyzbefe jelly eappreprete. ,Size-Y Orf Shape,y .FI Pinii posesmoflightness, this base unitA isalso lconcavedgon itsundersidgas isl shown at in Eig.` 2, althoughthis conavity'is `not abso# lutely necessary,- sinceathegboomerangfwings maybe made effe Size Sueientte'euppert the base unit through the air, if Asoidesired; Further, l have ShjeWni this bese-f ulit' ee beine provided with@feffraieefeemerehg venes Serbien renee .ele-Petelly enlefd. eofthebaeeeni; et @The pertieulanfsliepe effthesereHeS-ermeftefrerr SSeeCe-efths and referenitefFlg `2,{W.1l ASnv than they ere ehanedflerlgitlidlielli fe. semer-en unduateefem,erreetbefiwede l @eiser/epe esemblee iuhetmer termed@ .ddeer the enter :I ende VK.5

Wwe-relire eieleht 1' 1"' in??? sli-'ghiera enfemenf hanen) thei #P relewesl neming vrhleh" of these vanes, as has been stated, is pivotally mounted as at 4, althou h the particular location is not essential. n order to hold these vanes in any position of adjustment, I have provided the cord shown at 8, this cord paing through the ends of each of the vanes and through the mouth portion of the fish, to be securely tied at the tail portion of the fish, as is shown at 9. Itwill thus be seen that the vanesmay be ri dly secured in the desired position of adjustment and because of the various positions, the path of travel of the instrument, as a whole, will be correspondingly varied.

In order to further enhance the soaring properties of the instrument, one edge of each of the vanes is straight through substantially its entire length, while the opposite edge is formed to a compound curve, so that the intermediate portion 6 is preferably wider than the outer end portions 5 or the inner portions. For purposes of clearness, I have called the edges 10 the front edges, inasmuch as they are the ones which cleave the air, and the edges 11, rear edges. Because of the greater surface at the warped intermediate portion 6, the instrument is given additional soaring properties, and to reduce their weight, their under surfaces have also been concaved, asis shown at 12, although this latter is not absolutely essential.

In order to make the instrument more unique, I have provided it with an additional element, which I have termed a Spinner and which is designated by the reference numeral 13, this spinner being preferably mounted upon the pivot bolt structure and being rotatable independently of the rotation of the instrument as'a whole.- It will be noted that the wings of this spinner are warped to some extent, to offer resistance to the air and, therefore, the rotation of the spinner will naturally be in a direction opposite from the rotation of the instrument, as a whole, when it is thrown. However, additional means are provided for causing this rotation which may be in the opposite, or in the same direction as the rotation of the instrument as a whole, as may be desired. B v referring to -F ig. 3, it will be notedfthat the bolt structure comprises a hollow thimble 14 open at both ends and onto which the thimble 15 is secured. This thimble 15 abuts at one end against the shoulder 16 on the interior thimble and is itself provided with a shoulder 17 at its lower end. At its upper end it is provided with a nut 18 and by means of this nut 18 and the shoulder 17, the two vanes 3 and the base unit 1 are clamped in position. Against each opposite end of this shoulder 17, there are located a pair of washers 19 and against these the spinner 13 rests. This spinner is mounted to loosely rotate upon the thimble 16 and is prevented from dropping therefrom by means of the nut 20 and lower washer 21. The base unit 1 is provided with an arched member 22 which is rigidly secured thereto and similarly the spinner 13 has rigidly connected therewith an arch member 23. A ieXible member such as a rubber band 24 is rigidly secured to both these arch members and twisted so that upon release, it supplies energy to cause a rotation of the spinner. This may be utilized to obtain various effects audits value will be particularly apparent to those using the instrument as an act upon the stage.

From the foregoing description, it will be apparent that I have lprovlded an instrument which may be made to perform various feats. By means of the shape of the vanes, the distance the instrument will iy and the height to which it will soar, may be varied as desired. Likewise, this same regulation may be obtained by the adjustment of the vanes to, for instance, their dotted line position of Fig. 1, in which position they may be held by suitably securing the cord 8 in position. Likewise, a unique effect may be obtained by means of the spinner shown at 13.

What I claim, is:

1. An instrument of the character described comprising a plurality of vanes disposed at an angle to each other, said vanes being shaped longitudinally to'a curve resembling a flattened S. v

2. An instrument of the character described comprising a plurality of vanes disposed at an angle to each other, said vanes having a longitudinal undulating shape with their outer ends bent down to a lower level than their immediate preceding portion. y

3. An instrument of the character described comprising a plurality of vanes disposed at an angle to each other, said -vanes having a longitudinal undulating shape with their outer ends bent down to a lower level, than their immediate preceding portion, said vanes being also warped so that the transverse axis of the outer portion will be inclined to the corresponding axis of the inner portion.

4. An instrument of the character described comprising a plurality of vanes disposed at an angle to each other, said vanes having straight rear edges throughout substantially their lengths, and curved front edges of compound form, said vanes being of a length to present an elongated intermedate portion wider than the inner or outer en s.

5. An instrument of the character described comprising a plurality of vanes disposed at an angle to each other, said vanes having straight rear edges throughout substantially their lengths and curved front edges of compound form to present an elonn posed at an angle gated intermediate portion wider than the inner or outer ends, said vanes having a longitudinal undulating shape with their outer ends bent down to a lower level than the intermediate preceding portions and also warped so that the transverse axes of their outer portions will be inclined to the corresponding axis of the intermediate portion.

6. An instrument of the character described comprising a plurality of vanes disto each other, said vanes having a longitudinal undulating shape with straight rear edges throughout substantially their lengths and curved front edges of compound formto make the intermediate portions Wider than the inner and outer ends.

7. An instrument of the character described comprising a base unit, a plurality of boomerang vanes attached to said unit to make it fly when the instrument is properly thrown, and means whereby said vanes may be adjusted to various positions with respect to said unit.

8. An instrument of the character described comprising a base unit, a plurality of boomerang vanes pivotally attached by their ends to said unit to make it fly when the instrument is properly thrown, and means for holding said vanes in their adjusted positions with respect to said unit.

9. An instrument of lthe character de- 4hollow bolt structure so Acaused by the throwing of the instrument as a whole.

11. An instrument of the character described comprising a plurality of boomerang vanes disposed at an angle to each other, a hollow bolt structure for holding said vanes together, a spinner rotatably` mounted in connection with said bolt structure, and al flexible member operatively connected to saidvanes at one end and to said spinner at its other end and passing through said that when twisted and released it will cause rotation of said spinner.

In testimony whereof I affix my signature in presence of two witnesses. A

WILLIAM H. V. SHRUM.

Witnees:

C. C. SHEPHERD, BEA'rRIcE BURTON. 

